To create a cloud-init file for an Ubuntu 20.04 base image with the help of GitHub Copilot, you can use the following prompts:
"Generate a cloud-init file for setting up a base Ubuntu 20.04 image with necessary updates and security packages"
"Create a cloud-init configuration for Ubuntu 20.04 with basic system settings, user creation, and firewall configuration"
"Provide a cloud-init yaml file to configure Ubuntu 20.04 with essential tools, timezone, and SSH settings"
"Show me an example of a cloud-init file to install and configure essential packages on an Ubuntu 20.04 server"
Remember that you can always modify the generated code to suit your specific requirements.